Nut-lock.



PATENTED SEPT. 25, 1906.

H. H. SMITH.

NUT LOCK.

MPLLOATION FILED MAR.6,19OR

@7W5gflfliiil,

INVENTOR.

HARVEY E. SMITH, OF LANCASTER, OHIO. I NUT-LOCK.

Specification of Letters Patent.

rrirnnr orrion;

Application filed March 61 1906- e fl N 30 .576-

Z'n l/ZZ- u'lmm if may concern:

Be it known that l, lliinvnr H. Siirrn, a citizen of the United States, residing at Lancaster, in the county of l airi'ield and State of Ohio, have invented a new and useful Nutlioek, of which the following is a speeili(.'-ation.

This invention relates to nut-locks, and has for its object to simplify and improve the construction and increase the ellieieney of devices of this character.

With this and other objects in view, which will appear as the nature of the invention is better understood. the invention corsist's in certain novel features of construetimi, as hereinafter fully described and claimed.

in the accompanying drawings, forming a part of this specification, and in which corresponding parts are denoted by like designating characters, is illustrated the preferred form of the emlnnlilnent of the invention capable of carrying the same into practical op oration.

Figure l is a perspective view of a bolt. and not with the improvement applied thereto. Fig. 2 is a side elevation of the bolt portion of the improved device. Fig. 3 is a perspective view of the nut portion of the improved device. Fig. 4 is a perspective view of the washer portion of the improved device.

in the improved device is embraced a bolt lv lltl-Vl'l-l g a spiral groove ll formed in its threaded end, a nut 12, having a plurality of radial eliannels 13 extending partly through its lower lace, a washer 14,1utvinga lug l5 for engaging the groove 11 and with a cleft there through at one side at 16, an d the body of the washer cut away at- 17 adjacent to the cleft to render this portion of the washer resilient, and with a rib 18 at the terminal of the resilient portion. The incline of the spiral groove 11 corresponds to the incline of the threads of the bolt, so that when the washer 14 is positioned upon the bolt with its lug 15 in the groove 11 and the nut 12 positioned upon the bolt and rotated to cause it to bear upon the washer the washer will be picked up by the engagement of the rib 18 with one of the depressions 13 and carried around with the nut and at the same time moved longia nut engaging said bolt tudinally oi the bolt to a corresponding extent. Then when the Washer bears upon the structure to be held and is retarded thereby the continued movement of the nut causes the radial depressions 13 to pass over the rib to, the resilient portion 17 yielding suilicicntly to pern'iit this action.

By providing a plurality of the depressions 13 the nut may be turned a considerable distance after the washer .is in solid contact with the structure being held, so that the requisite grip of the nut may be applied to any desired extent.

Any required number of the depressions 13' may be employed and located at any required place upon the nut.

The depressioi'is 13 are inclined upon both sides, so that the rib and its resilient support 17 will yield to a force suliieient to operate the nut either in applying it to the bolt or in removing it therefrom, while at the same time holding the not against all tendency to displacement by jars or concussions to which it may be subjected whilein use.

The radial grooves extending only partly through the face of the nut do not mutilate or weaken the threads of the nut, but leave a solid unbroken faee entirely around the threaded aperture, as in an ordinary nut.

The relatively small portion of the surface of the nut occupied by the radial grooves does not materially reduce the bearing-face. llence thcnut having the grooves is as fully el'li zient as the ordinary nut.

The grooves '13 being comparatively shallow can be pressed in the face at the same time. that the nut is manufactured and will not, therefore, require special implements or extra handling to produce the grooves.

The device is simple in construction, can be inexpensively manufactured, and applied to any size or form of nut and bolt.

- Having thus described the invention, what is claimed is- In a nut-lock'the combination of a bolt having a spiral groove in its threaded portion,

and having a plurality of radial grooves extending partly through its bearing-face but not communieating with the threaded aperture thereof, a

ico

' s lit washer having an inwardly-projecting i my own I have hereto afiixed niy signature in ,ll g bearing in said spiral groove and with the the presence of two Witnesses.

portion adjacent to the joint reduced in 7 thickness and provided with a, radial rib HARVEX SMITH 5 adopted to engage said radial grooves one at Witnesses:

a time. .C. O. PICKERING, In-testimony that I claim the foregoing as g F. FULKERSONw 

